HEIDENHAIN TNC 640 (34059x-05) Cycle programming User Manual
Page 162
Fixed Cycles: Pocket Milling / Stud Milling / Slot Milling
5.6
RECTANGULAR STUD (Cycle 256, DIN/ISO: G256)
5
162
TNC 640 | User's Manual Cycle Programming | 1/2015
Climb or up-cut Q351: Type of milling operation
with M3
+1 = climb
–1 = up-cut
PREDEF: The TNC uses the value from the GLOBAL
DEF block (If you enter 0, climb milling is used for
machining)
Depth Q201 (incremental): Distance between
workpiece surface and bottom of stud. Input range
-99999.9999 to 99999.9999
Plunging depth Q202 (incremental): Infeed per
cut. Enter a value greater than 0. Input range 0 to
99999.9999
Feed rate for plunging Q206: Traversing speed of
the tool while moving to depth in mm/min. Input
range 0 to 99999.999; alternatively
FMAX, FAUTO,
FU, FZ
Set-up clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999; alternatively
PREDEF
Coordinate of workpiece surface Q203 (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
2nd set-up clearance Q204 (incremental):
Coordinate in the spindle axis at which no collision
between tool and workpiece (fixtures) can occur.
Input range 0 to 99999.9999; alternatively
PREDEF
Path overlap factor Q370: Q370 x tool radius
= stepover factor k. Input range: 0.1 to 1.9999;
alternatively
PREDEF
Approach position (0...4) Q437: Define the
approach strategy of the tool:
0
: Right of the stud (default setting)
1
: left corner below
2
: right corner below
3
: right corner top
4
: left corner top. If approach marks on the stud
surface are caused by the setting Q437=0, specify
another approach position.
NC blocks
8 CYCL DEF 256 RECTANGULAR STUD
Q218=60
;FIRST SIDE LENGTH
Q424=74
;WORKPC. BLANK SIDE
1
Q219=40
;2ND SIDE LENGTH
Q425=60
;WORKPC. BLANK SIDE
2
Q220=5
;CORNER RADIUS
Q368=0.2
;ALLOWANCE FOR SIDE
Q224=+0
;ANGLE OF ROTATION
Q367=0
;STUD POSITION
Q207=500
;FEED RATE FOR
MILLING
Q351=+1
;CLIMB OR UP-CUT
Q201=-20
;DEPTH
Q202=5
;PLUNGING DEPTH
Q206=150
;FEED RATE FOR
PLNGNG
Q200=2
;SET-UP CLEARANCE
Q203=+0
;SURFACE COORDINATE
Q204=50
;2ND SET-UP
CLEARANCE
Q370=1
;TOOL PATH OVERLAP
Q437=0
;APPROACH POSITION
9 L X+50 Y+50 R0 FMAX M3 M99